December 2018 1 9 Report
1.Sprawdź i popraw błędy. ^ - do potęgi drugiej
a) (2x+y)(x-2y)-x(x-y)=2x^-4xy+xy-2y^-x^+xy=x^-2xy-2y^
b) (3a-2b)(a-b)+2(a-b)(a-2b)=3a^-3ab-2ab+2b^+2(a^-2ab-ab+2b^)=5a^-10ab+6b^
c) (4k+1)(2k-1)-(k-1)(k-3)=8k^-4k+2k-1-(k^+3k-k+3)=7k^-4k-4
Bardzo proszę o szybką odpowiedź na już
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